grass
Gras is the German word for grass. It is a common noun that is used to describe the green, leafy plants that cover the ground. Gras is used in a similar way to the English word grass, and can be used to describe both the individual blades of grass and the collective mass of grass that makes up a lawn or field.
I'm lying in the grass.
This sentence is an example of using the noun 'Gras' (grass) as a part of a prepositional phrase to express location. Here, 'im Gras' means 'in the grass'.
He mows the grass.
This sentence is an example of using the noun 'Gras' (grass) as the direct object of a verb. In this case, 'das Gras' corresponds to the English 'the grass' and the verb is 'mäht' which means 'mows'.